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可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: Hi I'm new in iOS development. I've one main screen with navigation bar hidden true. From there I am navigating to another view using back segue. but when I click back it showing navigation bar on main screen. Here is my problem description. In main screen onviewload I am doing : self.navigationController.navigationBarHidden = YES; once user go to another view using back segue in new controller, I'm doing self.navigationController.navigationBarHidden = NO; And now, if I click back it will show navigation bar on main window also which I don't

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: Can anyone explain why the following produces 1,2 and the other produces 5? Should they not both produce 5? //produces 1,2 ( function () { var a = [ 5 ]; function bar () { if (! a ) { var a = [ 1 , 2 ]; } console . log ( a . join ()); } bar (); })(); Based on reading some articles about JS closure, I expect them both to produce 5. Can't seem to find an article anywhere that would give some insight as to why the first block produces otherwise. //produces 5 ( function () { var a = [ 5 ]; function bar () { if ( a ) { console . log ( a

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: I want to have certain styles applied to an element, when it does not have two classes (not either of the two classes, but both of the two classes). The :not selector does not seem to accept two classes. Using two seperate :not selectors causes it to be interpreted as an OR statement. I need the styles to be applied when it is does p : not (. foo . bar ) { color : #ff0000; } <p class = "foo" > This is a (.foo) paragraph. </p> <p class = "bar" > This is a (.bar) paragraph. </p> <p class = "foo bar" > This is a (.foo.bar) paragraph.

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I want to plot a bunch of rasters and I created a code to adjust breaks for each one and plot them trough a for loop. But i'm getting a problematic color scale bar, and my efforts haven't being effective to solve that. Example: I have precipitation ranging from 0 to 11.000...but most part of the data is between 0 and 5.000... and very few up to 11.000. So I need to change the breaks to capture this variation... more breaks where I have more data. Then I created a breaks object for that. But when I plot the raster, the scale color bar gets

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: I'm working on a rather large project that uses custom forms and would like to draw the non-client area of these forms myself. I can't use vcl-styles because many of the forms need to have a caption bar and border in a color picked at run time and as far as I know, styles are application wide by design. What I have accomplished so far is drawing the caption bar and border, drawing on the caption, disabling the minimize, maximize and close buttons and replacing them with my own. I achieved this by intercepting the WM_NCPaint and WM

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I have a fixed header and one hidden header which would display only after scrolling 100px from the top to the bottom. The Fiddle here explains the layout: .container { background: yellow; } .num1 { position: fixed; height: 25px; background: blue; text-align: center; width: 100%; top: 0; } .num2 { background: green; text-align: center; width: 280px; margin: 50px auto 0; } The blue div is fixed. The green div would be in hidden until the client scrolls it 100px of the page from top. After it crosses the 100px , it should start displaying and

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: Say I have a command I want to run ( cmd ) and a variable containing the arguments I want to pass to the function (something like --foo 'bar baz' qux ). Like so: #!/bin/sh command = cmd args = "--foo 'bar baz' qux" The arguments contain quotes, like the ones shown above, that group together an argument containing a space. I'd then like to run the command: $command $args This, of course, results in running the command with four arguments: --foo , 'bar , baz' , and qux . The alternative I'm used to (i.e., when using "$@" ) presents a

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: How can I hide a navigation bar from first ViewController or a particular ViewController in swift? I used the following code in viewDidLoad() : override func viewDidLoad() { super.viewDidLoad() self.navigationController?.isNavigationBarHidden = true } and also on viewWillAppear : override func viewWillAppear(animated: Bool) { self.navigationController?.isNavigationBarHidden = true } Both methods hide the navigation controller from all ViewControllers. 回答1: If you know that all other views should have the bar visible, you could use

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I'm hoping to accomplish this without the use of images, if at all possible. Is there a way to create the effect shown in the image programmatically without have to render each tab out as an image? Every question I've reviewed on SO has the tabs saved as JPGs, which is more work than I feel it should be. Any ideas? 回答1: I took a similar approach to @matcartmill but without the need for a special image. This solution is just based on your color. // set red as selected background color let numberOfItems = CGFloat(tabBar.items!.count) let

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I have a tab bar application and i have a button on my first view which i want to when pressed switch to my second tab programmatically in the tab bar. I can't quite seem to figure it out how to get the index etc to switch to it i've tried stuff like this. tababarController.selectedIndex = 1 With no success. 回答1: Thats pretty simple tabBarController is declared as an optional type var tabBarController: UITabBarController? { get } The nearest ancestor in the view controller hierarchy that is a tab bar controller. If the view controller or one